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Process of producing sintered plate corundum by ultra high temperature vertical kiln
Source: | Author:佚名 | Published time: 2021-01-02 | 3398 Views | Share:

This paper invention made public a sintered tabular corundum is made of super high temperature shaft kiln production process method, it is to choose low sodium and high purity alumina presintering Al left left [3] [2] O > 98.5% as raw material, after grinding, into a ball and dry, then put the material in the ball in the high temperature shaft kiln calcined at 1850 ~ 1920 ℃ scope, heat 1 ~ 1.5 hours, after two ventilation cooling, feeding the ball to the discharging mouth when the temperature dropped to below 80 ℃, burning into the ball through the broken material processing and screen is divided into finished products. The crystal size of the plate corundum prepared by this method is 20 ~ 200μm, the activity is high, the underfiring ratio of the material ball is low, the furnace is not blocked, the agglomeration, the quality index of the product reaches: density (g/cm↑[3]) : 3.58 ~ 3.62; Apparent porosity (%)<5; Water absorption (%) < 1.5; Electron microscopic structure: the crystal size is 0 ~ 200μm, and there are many closed pores less than 10μm in intercrystalline and intercrystalline. The crystal structure is compact.